Fix a 70-200 F/2.8 for $273.48?

I dropped my tried and true Canon 70-200 F/2.8L (non-IS). The threaded filter ring is dented, the outer zoom grip is cracked and the lens works but will physically not zoom. Canon also reports something loose inside.

CPS will charge me $273.48, including the 20 percent discount, including sales tax (the estimate, which I got two days after shipping the lens) lists the entire charge as as labor, so why a sales tax?) and shipping. I guess it's worth it, eh?